Ok I got a RACK VERSION of a rev1 chandler tube driver...BUT...this has been modified by the previous owner

He's an acoustic guitar master and used this ONLY as a preamp...so asked a tech to modify this to REMOVE any drive or distorte signalI can provide gutshots of everything inside but its modified so the request isANYONE HAS a PCB LAYOUT/PHOTO/ or actually a rack like the one I have...just Open it and give me some infoi cant really see any sign of mod (apart from some "new" resistor or unsoldered holes in the pcb ) but without anything of original ones its really hard to do something

Again i can post pics if anyone is interested...is a rack version withDRIVEBIASMASTERCONTOUR3 EQ

The way electronics work in a stompbox is like the way pixels move in a videogameit's Magic, in Technology

ok that was WAY helpful now I have something to work with.anyway I just unmounted/unscrewed the pcb pots and jacks....everything seems at his place...even solder joints....seems "original" but the sound is WAY different than an original one...

anyone has a shot of both sides of pcb ? (or even only component side) at least I wanna kno if a pair of unsoldered ground pads are normally empty or theres something wrong

The way electronics work in a stompbox is like the way pixels move in a videogameit's Magic, in Technology

DahakaNishoba wrote:ok that was WAY helpful now I have something to work with.anyway I just unmounted/unscrewed the pcb pots and jacks....everything seems at his place...even solder joints....seems "original" but the sound is WAY different than an original one...

anyone has a shot of both sides of pcb ? (or even only component side) at least I wanna kno if a pair of unsoldered ground pads are normally empty or theres something wrong

I serviced one of these a few weeks ago. (hence the schem) Shoot some pics and I'll tell you more if I can.

Edit; the owner sent me pics prior to shipping the unit:

chandler-1.jpg

chandler-2.jpg

You do not have the required permissions to view the files attached to this post.

Hmmmm huge thanks....ok so there are empty pads even in original one...I can't notice nothing major...just a different transformer (mine seems newer or just in better conditions....will shoot some macro of the inside tomorrow mornin...

The way electronics work in a stompbox is like the way pixels move in a videogameit's Magic, in Technology

I was wondering if anyone has a schematic for the Chandler rack mount TDR-101 Tube Driver. It is quite different from the original 4 knob pedal- which I bought in 1986/7 but traded in a year later for the rackmount version. (I should have gotten suspicious when the store was offering me the full price I had paid for it toward the "new and improved" model... in most cases it would have been 50-70% of what I paid originally.)

I thought that the rackmount version was too harsh so I added a cap or two (somewhere!) to mellow things out. I'm glad to have found the schematics for the original 4 knob floor pedal here- I hope to rewire my rackmount POS as the 4 knob floor pedal. (One good thing about the rackmount version was the boost switch- I may try to incorporate that into the good design.)

Thanks for all of the great information on the Tube Driver!

Steve Ahola

P.S. About 15 years ago I got a box of 3 or 4 broken rackmount TDR-101's from Dan Torres for $10 so now that I have the real schematic I will see what I can do with them! (I just need to remember what I did with that damn box!)

Last edited by lolbou on 09 Dec 2011, 10:08, edited 1 time in total.
Reason:Post moved to Chandler Rack thread : have a little search next time... ;)